From 9f03d0471dfac7dbc325dbfad8f4016e53f854a9 Mon Sep 17 00:00:00 2001
From: George Lemon <georgelemon@protonmail.com>
Date: Fri, 12 Apr 2024 16:56:06 +0300
Subject: [PATCH] wip

Signed-off-by: George Lemon <georgelemon@protonmail.com>
---
 ical.nimble            | 13 ++++++
 src/ical.nim           | 90 ++++++++++++++++++++++++++++++++++++++++++
 src/ical/submodule.nim | 12 ++++++
 tests/config.nims      |  1 +
 tests/test1.nim        |  8 ++++
 5 files changed, 124 insertions(+)
 create mode 100644 ical.nimble
 create mode 100644 src/ical.nim
 create mode 100644 src/ical/submodule.nim
 create mode 100644 tests/config.nims
 create mode 100644 tests/test1.nim

diff --git a/ical.nimble b/ical.nimble
new file mode 100644
index 0000000..b23edde
--- /dev/null
+++ b/ical.nimble
@@ -0,0 +1,13 @@
+# Package
+
+version       = "0.1.0"
+author        = "George Lemon"
+description   = "A tolerant, minimal iCalendar reader & writer for Nim"
+license       = "MIT"
+srcDir        = "src"
+
+
+# Dependencies
+
+requires "nim >= 2.0.2"
+requires "uuid4"
\ No newline at end of file
diff --git a/src/ical.nim b/src/ical.nim
new file mode 100644
index 0000000..c7a8fdf
--- /dev/null
+++ b/src/ical.nim
@@ -0,0 +1,90 @@
+# A tolerant, minimal iCalendar reader & writer for Nim.
+#
+#   (c) 2024 George Lemon | MIT license
+#       Made by Humans from OpenPeeps
+#       https://github.com/openpeeps/ical
+
+import std/[strutils, tables, times]
+import pkg/uuid4
+
+type
+  CalendarEventStatus* = enum # VEVENT
+    eventTentative = "TENTATIVE"
+    eventConfirmed = "CONFIRMED"
+    eventCanceled = "CANCELED"
+
+  CalendarTodoStatus* = enum # VTODO
+    todoNeedsAction = "NEEDS-ACTION"
+    todoCompleted = "COMPLETED"
+    todoInProcess = "IN-PROCESS"
+    todoCanceled = "CANCELED"
+
+  CalendarJournalStatus* = enum # VJOURNAL
+    journalDraft = "DRAFT"
+    journalFinal = "FINAL"
+    journalCanceled = "CANCELED"
+
+  CalendarType* = enum
+    calendarTypeEvent = "VEVENT"
+    calendarTypeTodo = "VTODO"
+    calendarTypeJournal = "VJOURNAL"
+
+  CalendarEvent* = object
+    id: Uuid
+    case calendarType: CalendarType
+    of calendarTypeEvent:
+      eventStatus: CalendarEventStatus
+      eventStartDate, eventEndDate: DateTime
+    else: discard # todo
+
+  Calendar* = object
+    id: string
+    locale: string = "EN"
+    events: OrderedTable[string, CalendarEvent]
+
+const
+  # https://github.com/peterbraden/ical.js/blob/master/examples/example_rrule.ics
+  # https://icalendar.org/iCalendar-RFC-5545/4-icalendar-object-examples.html
+  propProdid = "PRODID:-//$1//$2\n"
+  propBegin = "BEGIN:$1\n"
+  propEnd = "END:$1\n"
+  propVersion = "VERSION:$1\n"
+  propScale = "CALSCALE:GREGORIAN\n"
+  propMethod = "METHOD:$1\n"
+  propUuid = "UID:$1\n"
+  propDTStart = "DTSTART:$1\n"
+  propStatus = "STATUS:$1\n"
+  propDTEnd = "DTEND:$1\n"
+  propDTStamp = "DTSTAMP:$1\n"
+  propLastModified = "LAST-MODIFIED:$1\n"
+
+proc initCalendar*(id: string): Calendar =
+  Calendar(id: id)
+
+proc event*(cal: var Calendar, startDate, endDate: DateTime,
+    status: CalendarEventStatus = eventConfirmed) =
+  let id = uuid4()
+  cal.events[$id] = CalendarEvent(id: id,
+    eventStartDate: startDate,
+    eventEndDate: endDate,
+    eventStatus: status,
+    calendarType: CalendarType.calendarTypeEvent
+  )
+
+proc `$`*(cal: Calendar): string =
+  result = propBegin % ["VCALENDAR"]
+  add result, propVersion % "2.0"
+  add result, propProdid % [cal.id, cal.locale]
+  add result, propMethod % "PUBLISH"
+  for id, ev in cal.events:
+    add result, propBegin % $(ev.calendarType)
+    add result, propDTStamp % format(now(), "yyyyMMdd'T'HHmmss")
+    add result, propUuid % id
+    case ev.calendarType
+    of calendarTypeEvent:
+      add result, propStatus % $(ev.eventStatus)
+      add result, propDTStart % format(ev.eventStartDate, "yyyyMMdd")
+      add result, propDTEND % format(ev.eventEndDate, "yyyyMMdd")
+    else: discard # todo
+    add result, propEnd % $(ev.calendarType)
+  add result, propEnd % ["VCALENDAR"]
diff --git a/src/ical/submodule.nim b/src/ical/submodule.nim
new file mode 100644
index 0000000..8e21c99
--- /dev/null
+++ b/src/ical/submodule.nim
@@ -0,0 +1,12 @@
+# This is just an example to get you started. Users of your library will
+# import this file by writing ``import ical/submodule``. Feel free to rename or
+# remove this file altogether. You may create additional modules alongside
+# this file as required.
+
+type
+  Submodule* = object
+    name*: string
+
+proc initSubmodule*(): Submodule =
+  ## Initialises a new ``Submodule`` object.
+  Submodule(name: "Anonymous")
diff --git a/tests/config.nims b/tests/config.nims
new file mode 100644
index 0000000..3bb69f8
--- /dev/null
+++ b/tests/config.nims
@@ -0,0 +1 @@
+switch("path", "$projectDir/../src")
\ No newline at end of file
diff --git a/tests/test1.nim b/tests/test1.nim
new file mode 100644
index 0000000..fc7bd45
--- /dev/null
+++ b/tests/test1.nim
@@ -0,0 +1,8 @@
+import unittest, times
+import ical
+
+test "can add":
+  var cal = initCalendar("GOODCORP")
+  cal.event(now() + 1.days, now() + 2.days)
+  cal.event(now() + 4.days, now() + 10.days)
+  echo cal
\ No newline at end of file